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25 July, 05:10

Mary, who is 16 years old, is 4 times as old as her brother. how old will mary be when she is twice as old as her brother

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  1. 25 July, 06:49
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    Mary will be 24 years old when she will be twice as old as her brother.

    Here's how this has been calculated:

    If Mary is 16 years old and 4 times older than her brother, her brother's age

    = 16/4

    =4

    Mary’s brother is therefore 4 years old.

    Now let’s calculate the difference between Mary and her brother’s age through subtraction:

    Mary’s age - her brother’s age = 16-4

    =12

    Therefore, Mary is 12 years older than her brother

    So, for Mary to be twice as old as her brother, the formula will be = 12*2

    =24

    Therefore, Mary will be 24 years old when she will be twice as old as her brother.
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